Computational evaluation of resistance of fracture capacity for SUS304L of liquefied natural gas insulation system under cryogenic temperatures using ABAQUS user-defined material subroutine

This study examined the fatigue strength and fracture toughness of the structural components of membrane type liquefied natural gas carrier (LNGC) insulation systems, such as reinforced poly-urethane foam (R-PUF, insulation material) and 304 L stainless steel (STS 304 L, Primary barrier membrane), at both ambient and cryogenic temperatures. The fatigue strength of the LNGC insulation system was compared with that of low density R-PUF (130 kg/m3) and high density R-PUF (210 kg/m3). The fracture toughness of R-PUF and STS 304 L was investigated in terms of the density effect of R-PUF and the difference in the nickel composition of STS 304 L, STS 304 L (10.2%Ni) versus STS 304 L (9.4%Ni) at both ambient and cryogenic temperatures. In this study, the high density R-PUF (210 kg/m3) and STS 304 L (9.4%Ni) were proposed to improve the structural strength of the LNGC insulation system and reduce the cost. The fracture toughness was characterized in terms of the critical strain energy release rate (GIC) in the context of linear elastic fracture mechanics (LEFM). The geometries of the fracture toughness test used were the center-cracked tension (CCT) and double-edge-cracked tension (DECT) specimens according to ASTM STP381 standard.

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Liquefied natural gas tank analysis: cryogenic temperatures and seismic loading

Proceedings of the Institution of Civil Engineers - Engineering and Computational Mechanics ◽

10.1680/eacm.2012.165.1.49 ◽

2012 ◽

Vol 165 (1) ◽

pp. 49-56 ◽

Cited By ~ 2

Author(s):

Marcus N. T. Gillard ◽

Mathew J. Leslie ◽

David J. Vaughan ◽

William A. Spencer

Keyword(s):

Natural Gas ◽

Seismic Loading ◽

Liquefied Natural Gas ◽

Cryogenic Temperatures

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Efficiency Estimation of Thermoelectric Generators Application in the Liquefied Natural Gas Gasifiers

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.789-790.268 ◽

2015 ◽

Vol 789-790 ◽

pp. 268-272

Author(s):

Artem Novikov ◽

Dmitriy Uglanov ◽

Alexander Dovgyallo

Keyword(s):

Natural Gas ◽

Electrical Energy ◽

Liquefied Natural Gas ◽

Thermoelectric Generators ◽

Thin Wall ◽

Cryogenic Temperatures ◽

Numerical Estimation ◽

Estimation Of Parameters ◽

Heat Transfer Theory ◽

Efficiency Estimation

The object of the research is a thermoelectric generator installed in a liquefied natural gas gasifier. In this article the numerical estimation of parameters of thermoelectric generators (TEG) at cryogenic temperatures are presented and the experimental study of the thermoelectric properties of TEG at low temperatures as well as the outlook for using thermoelectric generators as a part of industrial liquefied natural gas gasifier has been carried out. In the process used heat transfer theory of cylindrical thin wall with a one-sided fins and the estimation of thermoelectric performance of TEG. As a result the experimental work has been investigated by TEG parameters at cryogenic temperatures; the evaluation of TEG number to produce electrical energy has been considered.

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Study on thermal insulation of liquefied natural gas cryogenic road tanker

Thermal Science ◽

10.2298/tsci19s4381l ◽

2019 ◽

Vol 23 (Suppl. 4) ◽

pp. 1381-1391 ◽

Cited By ~ 1

Author(s):

Edward Lisowski ◽

Filip Lisowski

Keyword(s):

Natural Gas ◽

Thermal Insulation ◽

Low Cost ◽

Liquefied Natural Gas ◽

Insulation System ◽

Heat Leakage ◽

Insulation Systems ◽

Natural Gas Transport ◽

Cost Of Materials ◽

Transient Thermal

The tanks designed for liquefied natural gas transport must be thermally insulated from the environment due to the low condensing temperature of the gas. The effectiveness of thermal insulation significantly affects the tank's operating parameters and its operating costs. As there is no perfect insulation, there is a need for analyses that would determine its suitability in specific applications. In this paper the issue of heat transfer through double-walled cryogenic tanks with evacuated insulation system was discussed. Afterwards the study of insulation variants of liquefied natural gas cryogenic road tanker was presented. The use of several layers of insulation made of modern and efficient materials such as aero-gel and fiberglass or the use of multi-layer isolation has been considered and compared to the use of perlite powder. The heat flux through insulation systems was tested for different variants of evacuated insulation under residual gas pressure of 10-1 Pa, 10-3 Pa, and 100 kPa. Finally, for selected insulation variants, the heat leakage was tested for 50 m3 liquefied natural gas road tanker. The investigation of heat-flow for the transient thermal analysis was performed by applying finite element method. The aim of the study was to determine the variant of insulation system with the relatively low heat leakage to the tank and low cost of materials and vacuum production.

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